单词 | hydrogens |
例句 | DEFINITIVE EXAMPLES 权威例句〔atom〕A methane molecule is composed of one carbon atom attached to four hydrogens.1个甲烷分子由1个碳原子与4个氢原子构成。外研社新世纪〔atom〕A methane molecule is composed of one carbon atom attached to four hydrogens.甲烷分子由1个碳原子与4个氢原子构成。柯林斯高阶 |
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